Wilde



Patented Aug. 25, 1925..

warren STATE ALEXANDER, E. VJILDE, OF BIVEBDALEpMARYLAND, ASSIGNOR 1'0 ALEXANDER WILDE, O1" UNION, NEW JERSEY.

SAFETY DEVICE FOR GBOMMET MACHINES.

Application filed August 19, 1922. Serial No. 583,052.

To all carom it may concern.

Be it known that I, ALLXANDER E. VVILDE,

a citizen of the United States, residing at litivcrdale in the county of Prince Georges and State of Maryland, have invented certain new Safety Devices for Grommet Machines, of which the following is a specification.

My said invention relates to a safety device for grommet machines and it is'an object of the invention to provide interlocking means which when applied to such a machine shall protect the operativev against mutilation such. as frequently occurs in the use of unprotected machines of this type. The specific features of my device are intended to cooperate primarily with a grommet machine, nevertheless mechanisms within the scope of my invention may be applied to various other types of machines and particularly to punching machines and the like.

In the use of my ii'iventionthe interlocking mechanisms prevent operation of the machine when work is being placed therein and it is a further object of my invention to provide a guard which shall become operative after the work is placed in the machine and the same is set in operation. Still another object is to provide a guard of special form particularly adapted to punching machines .and the like. Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate simi lar parts Figurel and Figure 2 a side elevation of the same with parts omitted, each of the views showing the parts in the same operative position.

In the drawings 10 indicatesya table supported on legs 11 and carrying a main frame member 12' in which is journaled a shaft 13 carrying a pulley 14 adapted to be clutched to the shaft or unclutched therefrom by mechanism here shown as having a one-revolution clutch and related parts such as are shown in the patent to Candee No. 920,726, May 4, 1909. The shaft has is a front elevation of my device,

a crank driving a slide 15 through pitman' 16 and the slide has at its lower end. a punch or former 17 cooperating with anvil 18 forming a Work support. The

clutch engaging member consists of a pin,

and useful improvements in.

brackets.

19 slid-ably mounted on the shaft 13 and adapted to engage in a hole .in the hub of pulley 14. Pin 19 is spring-impelled to engage the clutch and is retracted by a clutch tripper or actuator 20 pivoted at'2l and having a cam edge at 22 for engaging in a notch in the pin. The actuator is controlled by a foot lever 23connected thereto by links 24, 25, and 26, and an intermediate pivoted member 27. The link 26 passes through an eye 28 on a fixed part of the frame and a spring 29 surrounds the link and forces the same in a direction to move the tripper for disengaging the clutch.- The parts hitherto described are old in the'art and in the main are illustrated in the patent above referred to. I

According to my invention two brackets 30 are mounted on the front of the machine and a shaft 31 is journaled in said a ring 34:. A spiral spring 35 is supported on ring 34: and surrounds the upwardly projecting pin 35 of the anvil. At its upper end the spring encircles the downwardly projecting former on the slide 15.

' A link 36 connects rock arm 37 on shaft 31' to a bent lever 38 pivoted on the fixed frame near the actuator 20, said lever having an upwardly. extending rock arm 38. Theupper end of said rock arm is adapted to engage underneath the 'tripper 20 and prevent its withdrawal from the pin 19 thus'preventing engagement of the clutch.

A link 39 is also secured to link 37 and extends downwardly therefrom to a pedal 40.

The shaft has a pair of rock arms 32 which support rods 33 carrying In a typical operation of my device it is used for attaching grommets to mail bags of conventional .type. For this purpose'a hole is punched in the bag and the members of a grommet are placed on opposite sides thereof, after which therbag is placed on the anvil 1 8 withthe pin 3 projectingthrough thehole andgholding the parts in place on the anvil; 'Th'cpedal23i is depressed to release the pin' 1-9 and permit engagement of the clutch with the constantly driven pulley 14. With the present additions the guard 35 is normally in the position shown and must beraised before a mail bag can be placed On the anvil. 'VVhen the pedal 40 is depressed to permit such operation the ring 3 be raised to the dotted line position sing the guard spring. At the same time that the ring 3% is moved the arm 37 Wlll be lifted and through the link 3-6 will swing the rock arm 38 to place its end beneath the tripper 20, the result of this being that the clutch cannot be engaged while th operator is placing a bag in position on the anvil. Neither can the operator place his hands in dangerous position While the machine is running since at such times the tripper 20 is necessarily depressed in to the path otthe rock arm 38 (as will be seen from consideration of Figure 1) so that the free end of the rock arm 38 cannet be moved and therefore the guard cannot be raised, the tripper 20 and the rock arm 38 each blocking the operation of the other.

It will be obvious to those skilled in the art that n y device may be modified in various Ways as to accommodate it for use 'ith machines of various types and having different functions, therefore I do not limit my self to the specific form of the machine as shown in the drawings and described in the specification but only as indicated in the appended claims.

- Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a grommet machine, a work-support, punch reciprocating relatively thereto, a guard comprising a spring surrounding the punch and enclosing the space be tween it and the work-support, and means for compressing the spring to withdraw the guard, substantially as set forth.

2. in a. groi'mnet machine, a work-support, a punch reciprocating relatively thereto, a spring surrounding the punch and enclosing the space between it and the worksupport, a ring enga ing the lower end oi the spring, a rockshait adapted to lift the ring and compress the spring, and manually operated means tor moving said rockshai't, substantially a set forth.

3. In a stop mechanism, a Work-support, a ring surroiindhg the same, a member reciprocating relatively thereto, a spiral spring enclosing tin n the F. ll support and the i c. member, roclbshaift adjacent the means connecting-tin: ring to the 1' pressing the spring rockshait, and a treat a rock shaft, substa l. In a stop inecnai clutch having a pin slidable on one liiLiilllel' and adapted to engage a hole'in the other, a cam for retracting the pin, a guard tor a member oi the machine, and a bent lever connected at one end to the guard and adapted to engage said cam With its other end for locking the pin inunelutching posit-ion, substantially as set :i'orth.

in a stop mechanism, a c utch having a pin lable on one member and adapted to enga hole in the other, a pivoted cam retnrting the pin, a guard for a Workpart of the machine, and a lever having it. pivot parallel to that of the cam connected at one end to the guard and adapted to engage sa d cam with its other end for locking the in ant-hitching osition substantially iorth.

mechanism a clutch, a tripper g the clutch. a guard for a the machine, said guard into and out of operative pc- I sitively connected to the uard to more therewith saio part moving into and out of the path of said tripper whereby the clutch can be disengaged only when rd is in operative position, substantially as set tortl 7. Ii. machine having a reciprocating working member, a collapsible guard therei surrounding its path ot movement, driving mechanism, controlling means therefor, and operating means tor collapsing the guild said operating means and said means each blocking the opera- (3. in a stop or disc I '1 0. iii :1

let machine, a werk-support, rccating relatively thereto, a diiiig the punch and enclosing the space he means for COiHPlQST-Bing the spring to permit access to the work-support including a rocki or driving the machine in- -"cli, means to prevent actuation rch when the s ring is comshaft, eluding a i l Oi sa u Lilo.

.nen the clutch is enas set :l'orth.

ism, clutch, a pivoted 'c. clutch, a guard for a wer--ing pa positively connected to the guard, said lever and tripper each blocking the operation of the other, substantially as set forth.

10. in a stop mechar'sni, a clutch, a tripper for said clutch, a rod attached to the tripper for operating the same, a guard the machine, and alever ns l9 l YVILDE.

hurdred and twenty-two.

ALEXANDER other, substantially as set liorth.

ccn it and the ivorl-z-support, 

